Cause Mechanism and Treatment Measures of Ancient Landslide Resurrection on Mountainous Expressways
The ancient landslide resurrection is a vital difficulty faced by mountainous expressway construction and safety operations.Taking the Wangjiayan ancient landslide on K174+850 of Kelin Expressway as an example,this paper discusses the cause mechanism of the ancient landslide resurrection on mountainous expressways.It is found that rainfall is the main factor causing the ancient landslide resurrection,which means,the rise in the underground water level causes the soil to reduce its shear strength,increasing the risk of ancient landslide resurrection.So in the treatment of the ancient landslide on mountainous expressways,the environmental conditions should be fully considered in the full expressway life cycle,and possible influencing factors should be designed in advance to ensure safe traffic of the expressway during the operation period.Meanwhile,for the ancient landslide resurrection caused by water infiltration,the reinforcement of wet soft subgrades and the selection of support form should be comprehensively considered.
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